Insect screen



FIG. 1 is a front elevational view of an insect screen embodying the present invention;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view thereof; and,

FIG. 4 is a top plan view thereof.

The dimensions of the insect screen are indefinite. 

I claim the ornamental design for an insect screen, as shown and described. 